Travel time

function time(input) {
    let allCountry = {};

    for (const string of input) {
        let [country, town, cost] = string.split(' > ');
        cost = Number(cost);
        town = town[0].toLocaleUpperCase() + town.substr(1);

        if (!allCountry.hasOwnProperty(country)) {
            allCountry[country] = {};
        }
        if (!allCountry[country].hasOwnProperty(town)) {
            allCountry[country][town] = cost;
        }
        if (cost < allCountry[country][town]) {
            allCountry[country][town] = cost;
        }

    }

    let result = Object.keys(allCountry).sort();
    for (const string of result) {
        let output = `${string} ->`;
        let inner = Object.keys(allCountry[string]).sort(function (x,y) {
            return allCountry[string][x]-allCountry[string][y];
        });
        for (const string1 of inner) {
            output+=` ${string1} -> ${allCountry[string][string1]}`;
        }
        console.log(output);
    }

}